1991 Corvettes

This is the Section for 1991 C4 Chevrolet Corvettes. GM
continues the C4 Corvettes through 1996, there are 10 pages of 1991
Corvettes, be sure to take a look at all of the pages to see many
different colors, wheel combinations, body kits, interiors, engines,
tires, exhaust systems and tips on such models as the convertibles,
coupes, ZR1, Callaway, Collectors Edition, Grand Sport, and more.

All 1991 Corvettes had restyled rear exteriors which
are similar in appearance to the 1990 ZR-1 because both had convex rear
facias with four rectangular tail lamps. Both standard models and ZR-1
also featured new front designs with wraparound parking-cornering-fog
lamps, new side panel louvers, and wider body-side moldings in body
color.

Despite similar appearance, the 1991 ZR-1 still
received unique doors and rear body panels to accept the wide rear
wheels. The high-mount center stop lamp for 1991 ZR-1 is continued to be
roof-mounted. For all other than ZR-1, the lamp was integrated into the
new rear facia.

Base wheels were same size as 1990 (17 9.5), but a
new design.

Finned power steering coolers were included with all
1991 models.

A new option, RPO Z07, essentially combined the
previously available Z51 performance handling package with FX3 selective
ride/handling. But there were differences. In 1990, if FX3 and Z51 were
combined, some base suspension components were used to provide an
adjustable suspension range from soft to firm. The new RPO Z07 option
used all heavy duty suspension parts so the ride adjusted from firm to
very firm. Intended for aggressive driving or competition, Z07 was
limited to coupes.

The World Challenge race series continued in 1991,
but Bowling Green did not build specific Corvettes for the series. All
race modifications were the owners' responsibility.

Callaway Twin-Turbo conversions ended with the 1991
model year. Callaway built the 500th twin-turbo on 9-26-91 and
subsequent builds were specially badged and optioned (extra $600) as
"Callaway 500."

A power wire for cellular phones or other 12-volt
devices was added.

A power delay feature was added to all models which
permitted the stereo system and power windows to operate after the
ignition was switched to "off" or "lock." Power was cut after the driver
door was opened, or after fifteen minutes, whichever occurred first.

A sensor utilizing an oil pan float was added to all
models. The words "low oil" appeared on the driver information center to
signal a low oil condition.

Mufflers were revised for 1991 with larger section
sizes and better control tuning of exhaust note. The mufflers had lower
back pressure for improved performance, but power ratings were not
changed.

The AM band for radios was expanded to receive more
frequencies.

The ZR-1 "valet" power access system continued, but
was revised to default to normal power on each ignition cycle. The full
power light was relocated next to the valet key.